Cleaning Or Replacing The Ptfe Sealing; Remove From Service; Cleaning; Replacing - Emerson Rosemount 5408 Reference Manual

Reference Manual
00809-0100-4408, Rev BA
7.8

Cleaning or replacing the PTFE sealing

This section applies only to transmitters with a process seal antenna.
Replace the PTFE sealing if it shows any signs of damage. If it is not damaged, clean and reuse it.
7.8.1

Remove from service

Be aware of the following:
Follow all plant safety rules and procedures.

Do not remove the transmitter cover in explosive atmospheres when the circuit is live.

Do not remove the process connection while in operation. Removing while in operation may cause

process gas leaks.
7.8.2

Cleaning

To avoid electrostatic charges, use only a damp cloth to clean the PTFE surfaces. Clean the PTFE sealing
with care.
7.8.3

Replacing

Flanged version
Disassembly procedures
1. Insert two flathead screwdrivers between the PFTE sealing and flange.
2. Gently push the screwdriver handles forward until the PTFE sealing pops out.
Service and Troubleshooting
Service and Troubleshooting
November 2017
115